/Engine/Plugins/Animation/ControlRig/Source/ControlRig/Public/Rigs/RigHierarchyDefines.h
typedef TMulticastDelegate_TwoParams< void, [URigHierarchy](API\Plugins\ControlRig\Rigs\URigHierarchy) *, const [FRigEventContext](API\Plugins\ControlRig\Rigs\FRigEventContext) & > FRigEventDelegate